Pianoforte-action.



No. 668,508. f Patented Feb. I9,l90l. A. J. FLINT &. F. C. GILLETTE.

PIANOFORTE ACTION. [Application filed June 14, 1900.\ (No Model.)

2 Sheats$heet I.

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No. 668,508. Patented Feb. l9, l90l. A. J. FLINT &. F. C. GILLETTE.

PIANOFORTE ACTION.

A lication flied June 14, 1900. (No Model.) 2 Sheets-Sheet 2.

UNITED STATES PATENT OFF CE.

ARTHUR J. FLINT AND FRED O. GILLETTE, OF BOSTON, MASSACHUSETTS.

PlANOFORTE-ACTION.

SPECIFICATION forming part of Letters Patent N 0. 668,508, dated February 19, 1901.

Application filed June 14, 1900. Serial No. 20,349. (No model.)

To aZZ whom it may concern:

Be it known that we, ARTHUR J. FLINT and FRED O. GILLETTE, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Pianoforte-Actions, of which the following, taken in connection with the accompanying drawings, is a specification.

Our invention relates to the arrangement and construction of the under-hammer, jackfly, and connected parts of a pianoforte-action, the object being to so simplify and improve these portions of the action that the whole is made better, more durable, and cheaper. This object we attain by means of the mechanism shown in the accompanying drawings, in which- Figure 1 is a side elevation of the parts that constitute one of our improved actions, the rails being shown in section. The hammer is shown in its resting position-that is, down. Fig. 2 is also a side elevation of the parts, the hammer being represented as in the position that it occupies just after striking the wire,-

all the parts being ready for a repeat. Fig. 3 shows some of the parts in the position that they occupy when the key is pressed down to its lowest limits and when the jackfly lever is at its highest position. Fig. 4 is a front elevation of the jack-fly, showing its peculiar construction.

In the drawings a key K, of ordinary construction, isshown. This key has an adjustable support K for the jack-fly leverE. The said lever E is pivoted at A to the flange A on the rail A. The jack-fly lever E has a bracketed standard E, to the upper end of which the under hammer O is pivoted by the pivot O. The movement. of the under hammer in relation to the jack-fly lever is regulated by the adjustingscrew D, the head or button of which comes in contact with the bracket-arm standard E. A spring S serves to keep the working end 0 of the under hammer up, so as to sustain the hammer in the position required for repeat after the jack-fly has left the cushion H of the hammer-butt. (See Fig. The absolute upward movement of the working end 0 of the under hanimer is governed by the extension-arm 0 which, passing through a slot in the jack-fly, comes in contact with the adjustable button 0 of the adjustingscrew C in the fixed hammer-rail R. The extension-arm O is made of wire bent and flattened, as shown, whereby it admits of being located centrally in a slot made in the jack-fly and also of serving to reach out to a point under the hammerrail R, adapting it to be controlled by the adjustable button 0 of the adjusting-screw O in the fixed hammer-rail R.

The stem H of the hammer H is pivoted at H to the flange H which is secured to the hammei rail R in the usual manner. In its resting position the hammer-stem H rests upon the cushion of the spring-rail B.

The jack-fly F has a slot, as shown at T, Fig. 4:, through which the extension-arm C of the under hammer extends. This particular arrangement of the arm 0 and the slot in the jack-fly simplifies the construction and affords an additional steadiness and strength to the action and secures a firm broad bearing for the cushion H of the hammer-butt on the end of the jack-fly.

The jack-fly F is pivoted to its lever E by the pin F. Its upper end is held against the adjusting-button O on the end of the under hammer O. The spring F has a tendency to draw the upper end of the j ackfly toward and against (when permitted) the adjusting-button O at the end 0 of the under hammer C. The upper end of the jack-fly is thrown out from under the cushion. H of'the hammerbutt by the foot F (which is a part of the jack-fly) as it comes in contact with the button L on the screw L in the rail L. (See Fig. 3.)

We claim-- 1. In a pianoforte-action a jack-fly lever having a bracketed standard; an under hammer pivoted to said standard, and having an upwardly extending Working end (as C adapted to operate on the hammer as described and provided with an adjusting-button (as 0 for controlling the jack-fiy; an arm (as O extending through a slot made in the jack-fly, which serves to limit the upward motion of the said under hammer and said jack-fly substantially as and for the purpose set forth.

2. In a pianotorte-action a jack-fly lever; an under hammer pivoted to said jack-fly le- Ver and having inserted in its end a Wire which forms an extension for the said under names to this specification, in the presence of o hammer and passes through a slot made in 5 two subscribing witnesses, on this 12th day the jack-fly to a point under the hammer-rail l of June, A. D. 1900. whereby the motion of the said under ham- I i 5 nier may be limited by an adjustable button attached to said hammer-rail, and said adjust- J able button and hammer-rail substantially as Vitnesses:

and for the purpose set forth. FRANK G. PARKER,

In testimony whereof we have signed our 1 ANNA O. KINGSBURY. 

